How trustworhty is Used Cables?

My question is how trustworthy is Used Cables recommendations? Has anybody had any relative experience with them?
They claim that they base their oppinions on some type of data base, but I am sceptical.

My gear is Sony SCD-1, Linar preamp2, Linar 250i, Gershman Avant Garde RX-20.

Thanks, Frank.